/**
 * Write an algorithm to determine if a number is "happy".

 * A happy number is a number defined by the following process: 
 * Starting with any positive integer, replace the number by the sum of the squares of its digits, 
 * and repeat the process until the number equals 1 (where it will stay), 
 * or it loops endlessly in a cycle which does not include 1.
 * Those numbers for which this process ends in 1 are happy numbers.

 * Example: 19 is a happy number

 * 12 + 92 = 82
 * 82 + 22 = 68
 * 62 + 82 = 100
 * 12 + 02 + 02 = 1
 */
